Kelvin Manning, left, associate director, technical, of NASA’s Kennedy Space Center in Florida, points out various landmarks to White House Office of Science and Technology Policy Director Kelvin Droegemeier, right, on the roof of the Vehicle Assembly Building on July 10, 2019. Droegemeier visited the iconic rocket-assembly facility in the heart of Kennedy’s Launch Complex 39 Area during a tour of the multi-user spaceport.